ASHBURN, Va. - TWA Flight 800 plunged into the Atlantic Ocean 15 years ago, killing all 230 people on board, including 14 Long Islanders, but now the tragedy is being used to help future airline passengers.

News 12 Long Island has gained exclusive access to the Boeing 747's final destination at the National Transportation Safety Board's (NTSB) training headquarters in Virginia, where crash investigators say the plane has become an invaluable tool.

Officials say 1,200 people have been trained in accident reconstruction at the facility so far. They say the Flight 800 tragedy has already led to new rules protecting center fuel tanks from sparks and explosions, which the NTSB determined as the likely cause of the 1996 crash.

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NTSB Training CenterWikipedia on TWA Flight 800